%YAML 1.2
---
!!map {
  ? !!str "hr"
  : !!seq [
    !!str "Mark McGwire", 
    !!str "Sammy Sosa" 
    ],
  ? !!str "rbi"
  : !!seq [
    !!str "Sammy Sosa", 
    !!str "Ken Griffey" 
    ],
  }
